System Protection

I am trying to do a system restore because I am unable to boot into windows. The startup repair does nothing and when i try to go to system restore i can pick a point to restore from but when i click on it the next screen says "confirm disks to restore. However, I am not able to click the box next to my C: drive as it is grayed out, also the next button is grayed out. Under status it says "You must enable system protection on this drive", searching on google and various websites only shows how to enable system protection from the actual OS. So I was wondering if there was a way to enable system protection from the command prompt.
Thanks

If you currently have no restore points, there is nothing to restore. Turning restore on now does not help. The windows restore facilities are very flaky anyhow. For the future, I suggest you get free Macrium and image your system with that.